1F3F

STRUCTURE OF THE H122G NUCLEOSIDE DIPHOSPHATE KINASE / D4T-TRIPHOSPHATE.MG COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for activation of alpha-boranophosphate nucleotide analogues targeting drug-resistant reverse transcriptase.

Meyer, P.Schneider, B.Sarfati, S.Deville-Bonne, D.Guerreiro, C.Boretto, J.Janin, J.Veron, M.Canard, B.

(2000) EMBO J. 19: 3520-3529

  • DOI: 10.1093/emboj/19.14.3520
  • Primary Citation of Related Structures:  1F6T

  • PubMed Abstract: 
  • AIDS chemotherapy is limited by inadequate intracellular concentrations of the active triphosphate form of nucleoside analogues, leading to incomplete inhibition of viral replication and the appearance of drug-resistant virus. Drug activation by nucl ...

    AIDS chemotherapy is limited by inadequate intracellular concentrations of the active triphosphate form of nucleoside analogues, leading to incomplete inhibition of viral replication and the appearance of drug-resistant virus. Drug activation by nucleoside diphosphate kinase and inhibition of HIV-1 reverse transcriptase were studied comparatively. We synthesized analogues with a borano (BH(3)(-)) group on the alpha-phosphate, and found that they are substrates for both enzymes. X-ray structures of complexes with nucleotide diphosphate kinase provided a structural basis for their activation. The complex with d4T triphosphate displayed an intramolecular CH.O bond contributing to catalysis, and the R(p) diastereoisomer of thymidine alpha-boranotriphosphate bound like a normal substrate. Using alpha-(R(p))-boranophosphate derivatives of the clinically relevant compounds AZT and d4T, the presence of the alpha-borano group improved both phosphorylation by nucleotide diphosphate kinase and inhibition of reverse transcription. Moreover, repair of blocked DNA chains by pyrophosphorolysis was reduced significantly in variant reverse transcriptases bearing substitutions found in drug-resistant viruses. Thus, the alpha-borano modification of analogues targeting reverse transcriptase may be of generic value in fighting viral drug resistance.


    Organizational Affiliation

    Laboratoire d'Enzymologie et Biochimie Structurales, UPR-9063 CNRS, 91198 Gif-sur-Yvette, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (NUCLEOSIDE DIPHOSPHATE KINASE)
A, B, C
155Dictyostelium discoideumGene Names: ndkC-1, ndkC-2 (gip17, ndkB, gip17, ndkB)
EC: 2.7.4.6
Find proteins for P22887 (Dictyostelium discoideum)
Go to UniProtKB:  P22887
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
D4T
Query on D4T

Download SDF File 
Download CCD File 
A, B, C
2',3'-DEHYDRO-2',3'-DEOXY-THYMIDINE 5'-TRIPHOSPHATE
C10 H15 N2 O13 P3
ODSQODTUNULBHF-JGVFFNPUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
D4D
Query on D4D

Download SDF File 
Download CCD File 
B
2',3'-DEHYDRO-2',3'-DEOXY-THYMIDINE 5'-DIPHOSPHATE
C10 H14 N2 O10 P2
LXCAIISEDMYORY-JGVFFNPUSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
D4TKd: 21300 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.203 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 70.018α = 90.00
b = 70.018β = 90.00
c = 152.098γ = 120.00
Software Package:
Software NamePurpose
CCP4data scaling
MOSFLMdata reduction
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-09-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance